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Why is My Air Conditioning Unit Freezing Up?

A frozen AC unit indicates a problem. There are some common reasons for air conditioners to freeze up, but the best way to identify the issue is through a troubleshooting procedure. Freezing often occurs on older units that have been improperly maintained. Restricted airflow over the internal components, caused by dust buildup and clogged filters, can prevent an AC unit from absorbing heat efficiently. Condensation trapped along the internal components can freeze to the unit. Leaking refrigerant lines or internal damage to the working mechanical components can create pressure zones that lead to freezing conditions. While it may be possible to simply flush or clean the system to restore functionality, you should always call a qualified HVAC expert for a professional air conditioning diagnostic service before you attempt to diagnose or solve the problem on your own.

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